EP 1238182 A1 20020911 - FLOW ACTUATED SHUT-OFF VALVE
Title (en)
FLOW ACTUATED SHUT-OFF VALVE
Title (de)
VOLUMENSTROM-BETÄTIGTES VENTIL
Title (fr)
FERMETURE DE SOUPAPE ACTIONNEE PAR LE DEBIT
Publication
Application
Priority
- GB 0003927 W 20001013
- US 45968499 A 19991213
Abstract (en)
[origin: WO0144617A1] The present invention generally provides a system and method for selectively sealing a drill string (14) or other tubular member. In one aspect, a sealing member, such as a valve (50), allows a certain level of flow of drilling fluids and/or other fluids through one or more flow channels (76) when the valve is open. To close the valve, the flow rate is increased so that a backpressure develops and urges the valve to a closed position. The valve can remain in position in the drill string and alternately open (right-hand half of the figure) and close (left-hand half of the figure) depending on the flow rate and/or the pressure drop through the valve. The valve also comprises a removable plug (90) disposed in the valve to provide access with, for example, wireline tools to a region below the valve in a wellbore.
IPC 1-7
IPC 8 full level
E21B 21/10 (2006.01)
CPC (source: EP US)
E21B 21/10 (2013.01 - EP US); Y10T 137/7785 (2015.04 - EP US)
Citation (search report)
See references of WO 0144617A1
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
WO 0144617 A1 20010621; AU 7677200 A 20010625; CA 2394121 A1 20010621; CA 2394121 C 20071211; DE 60016970 D1 20050127; DE 60016970 T2 20051208; EP 1238182 A1 20020911; EP 1238182 B1 20041222; US 6349771 B1 20020226
DOCDB simple family (application)
GB 0003927 W 20001013; AU 7677200 A 20001013; CA 2394121 A 20001013; DE 60016970 T 20001013; EP 00966333 A 20001013; US 45968499 A 19991213